The easiest solution may be to simply overwrite the main class (com.lab126.linux.arm.LuigiServiceProvider) in start.sh with, say, com.mobileread.ixtab.jbpatch.bootstrap.K3Startup (or so). This class would do all the required wiring, and then call the LuigiServiceProvider main() method.

Of course, this requires the framework startup script to be changed to use com.mobileread.ixtab.jbpatch.bootstrap.K3Startup as the main class, and the jbpatch jar to be in the classpath (I suggest /opt/amazon/ebook/lib/jbpatch.jar)

If the framework starts up normally, you can then check /tmp/jbpatch.log to see if JBPatch is working correctly.